SNVU869 august   2023 LM5185-Q1

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Setup
    2. 2.2 Header Information
    3. 2.3 Test Points
    4. 2.4 Assembly Instructions
    5. 2.5 Best Practices
  9. 3Implementation Results
    1. 3.1 Performance Data and Results
      1. 3.1.1 Conversion Efficiency
      2. 3.1.2 Output Voltage Regulation
      3. 3.1.3 Operating Waveforms
        1. 3.1.3.1 Start-up
        2. 3.1.3.2 Load Transient Response
        3. 3.1.3.3 Switching
    2. 3.2 Thermal Performance
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials (BOM)
  11. 5Compliance Information
    1. 5.1 Compliance and Certifications
  12. 6Additional Information
    1. 6.1 Trademarks

2.4 Assembly Instructions

Refer to Section 2.5 of this user's guide for the important notice on safety concerns when handling the EVM. The following are the recommended instructions for the EVM test setup assembly.

Input Connections

  • Prior to connecting the DC input source, set the current limit of the input supply to 100 mA maximum. Verify the input source is initially set to 0 V and connected to the VIN+ and VIN– connection points, as shown in Figure 3-1. An additional input bulk capacitor is recommended to provide damping if long input lines are used.
  • Connect Voltmeter 1 at VIN+ and VIN– connection points to measure the input voltage.
  • Connect Ammeter 1 to measure the input current and set to at least 1-second aperture time.

Output Connections

  • Connect electronic load to VOUT+ and VOUT- connection points as shown in Figure 3-1. Set the load to constant-resistance mode or constant-current mode at 0 A before applying input voltage.
  • Connect Voltmeter 2 at VOUT+ and VOUT- connection points to measure the output voltage.
  • Connect Ammeter 2 measure the output current.

Test Procedure

  • Set up the EVM as described above.
  • Set load to constant resistance or constant current mode and to sink 10 mA.
  • Increase input source from 0 V to 20 V; use voltmeter 1 to measure the input voltage.
  • Increase the current limit of the input supply to 1000 mA.
  • Use voltmeter 2 to measure the output voltage, vary the load from 10 mA to 1000 mA DC; VOUT must remain within the load regulation specification.
  • Set the load current to 500 mA (50% rated load) and vary the input source voltage from 20 V to 60 V; VOUT must remain within the line regulation specification.
  • Use the oscilloscope to probe different signals of interest. Be careful of the probe ground reference.
  • Decrease load to 10 mA. Decrease input source voltage to 0 V.
  • Shut down both the input source and load, and then the voltmeters and ammeters.